Patent US4521787A successfully refreshed from Google Patents.
US4521787A
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US
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Ink jet recording head
Assignee: Canon Inc
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Filing: 1983-06-09
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Granted: 1985-06-04
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Expires: 2003-06-09
Abstract
Abstract An improved ink jet recording head is provided which comprises a substrate, and a cured film of a photosensitive resin for the formation of ink pathways and a covering over said pathways. Said covering comprises a flat plate made of a UV-light transmissive material having a photosensitive resin film adhered on both surfaces thereof. This ink jet recording head is precise, reliable and durable.
Inventors
- 👤 Masami Yokota
- 👤 Hiroshi Sugitani
- 👤 Tadayoshi Inamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:01
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1621; B41J2/164; B41J2/1601; B41J2/1604; B41J2/1623; B41J2/1631; B41J2/1632
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
An ink jet recording head, comprising a substrate, and a cured film of a photosensitive resin defining ink pathways and a covering over said pathways wherein said covering comprises a flat plate made of a UV-light transmitting material having respective cured films of photosensitive resin adhered on both surfaces thereof.
Claim 2
Dependent Claim
50 words
An ink jet recording head, comprising a substrate, and a cured film of a photosensitive resin defining ink pathways and a covering over said pathways wherein said covering comprises a flat plate made of a UV-light transmitting material having respective cured films of photosensitive resin adhered on both surfaces thereof.
Claim 3
Dependent Claim
23 words
An ink jet recording head according to claim 1, wherein said cured films of said covering are of dry film type photosensitive resin.
Claim 4
Dependent Claim
20 words
An ink jet recording head according to claim 1, further comprising ink discharging pressure generating elements placed on said substrate.
Claim 5
Dependent Claim
23 words
An ink jet recording head accordng to claim 1, wherein said respective cured films of said covering have different thicknesses from each other.
Claim 6
Dependent Claim
24 words
An ink jet recording head according to claim 1, wherein said cured films of said covering are of different photosensitive resins from each other.
Claim 7
Dependent Claim
22 words
An ink jet recordng head according to claim 1, wherein said cured films of said covering are of the same photosensitive resin.
References Cited (Backward Citations)
US4330787A
Cited
US4437100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |